5209887166117 has 2 divisors, whose sum is σ = 5209887166118. Its totient is φ = 5209887166116.

The previous prime is 5209887166097. The next prime is 5209887166157. The reversal of 5209887166117 is 7116617889025.

5209887166117 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2845999366081 + 2363887800036 = 1687009^2 + 1537494^2 .

It is a cyclic number.

It is not a de Polignac number, because 5209887166117 - 2³¹ = 5207739682469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5209887166157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2604943583058 + 2604943583059.

It is an arithmetic number, because the mean of its divisors is an integer number (2604943583059).

Almost surely, 2^{5209887166117} is an apocalyptic number.

It is an amenable number.

5209887166117 is a deficient number, since it is larger than the sum of its proper divisors (1).

5209887166117 is an equidigital number, since it uses as much as digits as its factorization.

5209887166117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10160640, while the sum is 61.

The spelling of 5209887166117 in words is "five trillion, two hundred nine billion, eight hundred eighty-seven million, one hundred sixty-six thousand, one hundred seventeen".